New process could cause titanium price to tumble

May 20, 2008

Next-generation combat vehicles equipped with titanium alloy doors will provide increased safety for soldiers. The doors are made using low-cost titanium powders and a non-melt consolidation process developed by a team of Oak Ridge National Laboratory researchers that includes Bill Peter of the Materials Science and Technology Division. Credit: Photo by Jason Richards

Whether for stopping cars or bullets, titanium is the material of choice, but it has always been too expensive for all but the most specialized applications.

That could change, however, with a non-melt consolidation process being developed by Oak Ridge National Laboratory and industry partners. The new processing technique could reduce the amount of energy required and the cost to make titanium parts from powders by up to 50 percent, making it feasible to use titanium alloys for brake rotors, artificial joint replacements and, of significant interest now, armor for military vehicles.

“We recently exhibited the new low-cost titanium alloy door made by ORNL for the Joint Light Tactical Vehicle, which is a next-generation combat vehicle,” said Bill Peter, a researcher in ORNL’s Materials Science and Technology Division. “By using a titanium alloy for the door, BAE Systems was able to reduce the weight of its vehicle yet at the same time decrease the threat of armor-piercing rounds.”

The lightweight titanium alloy also improves the operation of the door and increases mobility of the vehicle, making it even more useful to the military.

Peter noted that the non-melt approach, which includes roll compaction for directly fabricating sheets from powder, press and sinter techniques to produce net shape components and extrusion, offers many advantages over traditional melt processing.

“Instead of using conventional melt processing to produce products from titanium powder, with the new method the powders remain in their solid form during the entire procedure,” Peter said. “This saves a tremendous amount of energy required for processing, greatly reduces the amount of scrap and allows for new alloys and engineered composites.”

While powder metallurgy has been used to produce components for many years, titanium products have not widely been fabricated using these methods because of the high cost of conventional titanium powders. Now, however, new low-cost titanium powders are enabling ORNL, International Titanium Powders, Ametek and BAE Systems to develop these technologies for titanium.

In coming years, researchers expect lightweight corrosion-resistant titanium alloys to make their way into many other products, including automobiles, which will benefit from the decreased weight and will be able to deliver improved fuel economy.

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How nice would it be to have a car that didn't rust, or shatter like glass on a cold day "Saturn".

Doesn't sound particularly useful to me. Rust is only a problem if you insist on using the same car for well over a decade and not taking care of it or if you live in areas where lots of salt is used to keep the roads free of ice in winter.

Shattering is exactly what you want to use carbon fibre for. This process absorbs a great deal of impact energy per weight. Carbon fibre cones are excellent as light weight crumple zones.

save weight to improve fuel economy on vehicles? You've got to be kidding. Maybe in the Foreign car companies this will happen. I suspect that the big 3 American Auto companies will use the weight savings to make even bigger SUVs with the same awful gas milage.